Fluid filtration unit for use in oil well hole drilling operations



FIG. 1 is a front and top perspective view of a fluid filtration unit for use in oil well hole drilling operations showing my new design;

FIG. 2 is a rear left side and top perspective view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a rear right side and top perspective view thereof.

The broken-line showing of the wheel assembly in FIGS. 1, 2 and 4 is for illustrative purposes only and forms no part of the claimed design. The partial surface treatment on the bottom platform is understood to cover the entire platform surface. 

The ornamental design for a fluid filtration unit for use in oil well hole drilling operations, as shown and described. 